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Development of an electrochemical flow injection immunoassay (FIIA) for the real-time monitoring of biospecific interactions

Killard, Anthony J. and Zhang, Shanqing and Zhao, Huijun and John, Richard and Iwuoha, Emmanuel I. and Smyth, Malcolm R. (1999) Development of an electrochemical flow injection immunoassay (FIIA) for the real-time monitoring of biospecific interactions. Analytica Chimica Acta, 400 (1). pp. 109-119. ISSN 0003-2670

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Not only are sensors a revolution in analysis; they themselves are also experiencing a revolution brought about by parallel developments in sensor fabrication techniques and materials, polymer chemistry, signal processing methodologies, the increased use of biomolecular processes as a means of analyte detection, and the coupling of sensors to other techniques such as flow injection analysis. Many of these developments have been incorporated into the present study, which we are undertaking in the development of our immunosensor technology. The system described here utilises screen-printed electrodes which are low-cost, disposable devices that are simple to fabricate. Incorporated into our sensor is the electroactive polymer, polyaniline, which brings about mediatorless redox coupling between the electrode and biomolecular components attached to the polymer surface. This system also utilises enzyme-labelled antibodies as the biomolecular recognition component for the analysis of the test analyte, biotin. The system has also been integrated into a flow injection system. This has led to the monitoring of real-time antibody-antigen interactions using electrochemical methods and foreshadows the development of single-step immunosensors.

Item Type:Article (Published)
Uncontrolled Keywords:flow injection; immunoassay; biosensor; screen printed electrode; polyaniline;
Subjects:Physical Sciences > Chemistry
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Science and Health > School of Chemical Sciences
Research Initiatives and Centres > National Centre for Sensor Research (NCSR)
Official URL:
ID Code:20
Deposited On:08 Nov 2006 by DORAS Administrator. Last Modified 30 Jan 2009 11:10

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